Information Processing Letters
Information Processing Letters > 2013 > 113 > 14-16 > 538-542
Information Processing Letters > 2013 > 113 > 19-21 > 693-697
Information Processing Letters > 2013 > 113 > 14-16 > 538-542
Information Processing Letters > 2013 > 113 > 19-21 > 693-697